package thread;

public class ThreadDemo1 {
    public static void main(String[] args) {
    Thread t1 = new MyThread1();
    Thread t2 = new MyThread2();
    t1.start();
    t2.start();

    }



}
class MyThread1 extends Thread {
    public void run() {
        for (int i = 0; i < 1000; i++) {
            System.out.println("" + "who are you?");
        }
    }
}
class MyThread2 extends Thread {
    public void run() {
        for (int i = 0; i < 1000; i++) {
            System.out.println("" + "what are you doing?");
        }
    }
}